THE SPIDER CRABS OF AMERICA 401 



body maroon flecked ^\■itl^ white and yellow (Henderson, note on 

 male, Cat. No. 46036). 



Measurements. — Male (15075), length of carapace including ros- 

 trum 51.2, width without spines 58.3, with spines 65 mm. 



Age and sex variations. — Tlie above description applies to 2 lots of 

 males of good size from Florida (15075 and 42130), while a single 

 male only 26 mm. long, from Swan Islands, in the western Caribbean 

 Sea, north of Honduras, agrees with them except as to the develop- 

 ment of the chelae. A large number of specimens in the collection, 

 comprising all the females and young and the undeveloped males 

 (mth the exception of 15074), differ from the adult male type as 

 follows: The surface of the carapace is densely covered with hair. 

 The rostral horns of the females and undeveloped males are shorter 

 and further apart, while the horns of the young specimens are longer 

 and sharper. The spines of the inner margin of the cheliped are 

 slenderer and sharper, especially noticeable at the distal angle of 

 the merus where in place of the truncate lobe in the old male there 

 are from 1 to 3 sharp spines. The dorsal surface of the carpus is 

 more or less spinous. The extreme proximal end of the palm is 

 spinulous and hairy above. 



Individual variation. — A male of medium size (17206) and an adult 

 female (4171) have no spinules on the manus. They are both thin- 

 shelled specimens with hair on carapace very short and hair on legs 

 so scanty as to make the spines conspicuous. 



A male of large size (46036) but wdth undeveloped chelipeds has 

 no spinules on the manus, while two similar males (46975) have 

 rudiments of spinules. 



Hahits. — Lives near the shore where it hides in holes in the rocks 

 covered with madrepores; it is nocturnal, seeking its food only at 

 night when it may be easily caught by using a torch (Desbonne). 



Range. — -From South Carolina to Fernando Noronha, Brazil. 



Material examined — 



Charleston, wSouth Carolina; 1852; L. Agassiz; 1 male (2100, 

 M. C. Z.). 



Green Turtle Cay, Bahamas; E. A. Andrews; 1 female (20707). 



Abaco Island, Bahamas; 1886; Albatross; 1 young (16301). 



Miami, Florida; G. M. Gray; 1 male (42130). 



Indian Key, Florida; H. Hemphill; 2 males, 7 females (14081). 



Knights Key, Florida; H. Hemphill; 2 males, 11 females (14073). 



Big Pine Key, Florida; H. Hemphill; 3 males, 6 females (14030) ; 3 

 males (15075). 



Sand Key reef, Florida; J. B. Henderson; 3 young (46879). May 

 11, 1911; 3 males, 2 young females (46975). Ma}', 1913; 2 males 

 (46036). 



